Lighting device and system

Abstract

Embodiments of the invention relate generally to lighting devices and, more particularly, to elongate lighting devices having components adapted for interconnection, as well as lighting systems including such lighting devices. In one embodiment, the invention provides a lighting device comprising: an elongate housing; at least one light-emitting device within the housing; and a first connection device at a first end of the elongate housing, the first connection device being electrically connected to the at least one light-emitting device.

What is claimed is: 
     
       1. A lighting system comprising:
 a first lighting device comprising:
 an elongate housing having:
 a support shelf extending across an interior of the elongate housing to support a circuit board; and 
 a circuit board restraining member for restraining the circuit board against the support shelf; 
 
 at least one light-emitting device within the housing; 
 a first connection device at a first end of the elongate housing, the first connection device being electrically connected to the at least one light-emitting device; and 
 a second connection device at a second end of the elongate housing, the second connection device being electrically connected to the first connection device; 
 
 a second lighting device comprising:
 an elongate housing having:
 a support shelf extending across an interior of the elongate housing to support a circuit board; and 
 a circuit board restraining member for restraining the circuit board against the support shelf; 
 
 at least one light-emitting device within the housing; 
 a third connection device at a first end of the elongate housing, the third connection device being electrically connected to at least one of the first connection device or the second connection device, 
 
 wherein an electrical current supplied to the first connection device of the first lighting device is delivered to the second lighting device via the third connection device. 
 
     
     
       2. The lighting system of  claim 1 , wherein the at least one light-emitting device of each of the first and second lighting devices includes a plurality of light-emitting diodes (LEDs) disposed along a circuit board within the housing. 
     
     
       3. The lighting system of  claim 2 , wherein the plurality of LEDs have a power density of at least about 1000 lumens/ft. 
     
     
       4. The lighting system of  claim 2 , wherein the plurality of LEDs have a beam angle of greater than 90 degrees. 
     
     
       5. The lighting system of  claim 1 , further comprising:
 an electrical supply device for supplying the electrical current to the first connection device. 
 
     
     
       6. The lighting system of  claim 1 , wherein the elongate housing of each of the first and second lighting devices is at least about two feet long and the at least one light-emitting device of each of the first and second lighting devices includes a plurality of light-emitting devices disposed within and along a length of the elongate housing. 
     
     
       7. The lighting system of  claim 6 , wherein the elongate housing of each of the first and second lighting devices is between about four feet and about eight feet long. 
     
     
       8. A lighting system comprising:
 a first lighting device comprising:
 an elongate housing; 
 at least one light-emitting device within the housing; 
 a first connection device at a first end of the elongate housing, the first connection device being electrically connected to the at least one light-emitting device; and 
 a second connection device at a second end of the elongate housing, the second connection device being electrically connected to the first connection device; 
 
 a second lighting device comprising:
 an elongate housing; 
 at least one light-emitting device within the housing; 
 a third connection device at a first end of the elongate housing, the third connection device being electrically connected to at least one of the first connection device or the second connection device, 
 
 wherein an electrical current supplied to the first connection device of the first lighting device is delivered to the second lighting device via the third connection device. 
 
     
     
       9. The lighting system of  claim 8 , wherein the at least one light-emitting device of each of the first and second lighting devices includes a plurality of light-emitting diodes (LEDs) disposed along a circuit board within the housing. 
     
     
       10. The lighting system of  claim 9 , wherein the plurality of LEDs have a power density of at least about 1000 lumens/ft. 
     
     
       11. The lighting system of  claim 9 , wherein the plurality of LEDs have a beam angle of greater than 90 degrees. 
     
     
       12. The lighting system of  claim 8 , further comprising:
 an electrical supply device for supplying the electrical current to the first connection device. 
 
     
     
       13. The lighting system of  claim 8 , wherein the elongate housing of each of the first and second lighting devices is at least about two feet long and the at least one light-emitting device of each of the first and second lighting devices includes a plurality of light-emitting devices disposed within and along a length of the elongate housing. 
     
     
       14. The lighting system of  claim 13 , wherein the elongate housing of each of the first and second lighting devices is between about four feet and about eight feet long.